For sure i could get time like that if the phone was in my pocket all day, but i do use the hell out of it.
Do this for me please, when you have a few hours of spare time do everything you can to use the battery. Play 3d games or emulators while playing music, or call someone for a couple hours, browse the webs and watch a lot of youtube. Just use the heck out of your phone, and tell us your results.
With the extended battery, on wifi and using setcpu to underclock, I can manage mayybe 6 or 7 hours. This is also on fission with bloat removed, only 2 syncing widgets and low brightness. Can anyone else tell me their heavy usage life so we can compare?